Question about 2001 GMC Jimmy

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My 2001 GMC Jimmy is stuck in 4 Lo.

It slipped into 4 Lo on its own and know won't change back into 2 WD. Not long before the check 4WD light came on and then "pop!' stuck in 4 Lo.

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  • damo011 Nov 23, 2008

    it will not come out of 4 lo now service 4 wh drive is on

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I believe those are vacuum controlled on top of the transfer case is a plug with 3-4 vacuum lines going to it,you will need to take it out and see if the check ball is stuck if it is it needs to be replaced

Posted on Nov 12, 2008

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Four buttons on dash for 4 wd. won't stay on 2 wd and it goes back to 4wd by itself


Sorry, but three possibilities. Most likely the 4wd actuator motor on the transfer case went bad. This is pretty common. They also encounter switch problems, but it sounds like your switch is doing what it's supposed to. One more thing, there is a 4wd control module, usually in the right kick panel. I'm betting on the shift motor though.

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2001 jimmy stuck in 4wd low


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